Window balances and sash guide

Hello,

Your top sash guide is similar to the 18-178 pair. Take a look at the dimensions below to confirm they match up to yours. 

Alternate image for 18-178

Alternate view of 18-178

It looks like you have either our S351-29, with a 15-002 bottom attachment, or S390-29, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 2830 spring strength option for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.